Method of forming fire-boxes.



H. W. JACOBS.

METHOD OF FORMING PIRE BOXES.

APPLGATION FILED 00T. 20. 1909,

Patented Feb. 25, 1913.

14 SHEBTS-BHEET'L vwo who@ H. W. JACOBS.

METHOD 0F PORMING FIRE BOXES.

APPLIUATION FILED 00T. 20, 1909.

Patented Feb.25,1913.

14 SHEETS-SHEET 2.

we ooooo owl ooono OO u00e0 MO U0 o ooooo MO QW oouoo OO 0 ooon O Qoocboooooobqaooooooooooooooo Dvi/humus APPLICATION FILED 00T. 20, 1908.

Patented Feb. 25, 1913.

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H. W. JACOBS.

METHOD OP FORMING FIRE BOXES.

APPL/:Anon FILED 00T. 2o, 1909.

yPatented Feb. 25.1913.

14 SHEETS-'SHEET 4.

H. W. JACOBS. METHOD or PORMIN'G FIRE Boxes.

APPLICATION FILED 00T. 20, 1909.

Patented Feb. 25, 1913.

14 sums-sum1' 5.

o oo oo o0 oooooooooodooooooooooooooo H. W. JACOB.

METHOD 0F FORMING PIRE BOXES.

APPLICATION FILED 00T. 20, 1909.

Patented Feb. 25, 1913.

14 SHEETS-SHEET 6.

ooo Oooooooooooooo ooooooooooooooooooooooooo H. W. JACOBS.

METHOD 0F FORMING FIRE BOXES.

APPLIOATION FILED 001220, 1909.

Patented Feb. 25, 1913.

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METHOD 0F FORMING FIRE BOXES. APPLIoA'rIoN FILED 00T. 2o, 1909.

1 ,054,420. Patented Feb. 25, 1913.

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METHOD 0F Pom/UNG HRB BOXES.

APPLICATION FILED 00T. 20, 1909.

1,054,420. Patented Feb. 25, 1913.

14 SHEETS-SHEET 9.

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METHOD 0F FORMING FIRE BOXES.

APPLICATION FILED 001220, wou.

1,054,420. Patented Fep. 25, 1913. A l 14 xmms-sumar l1o.

O0 0000000006000000000600 o D El CI D Cl Cl H. W. JACOBS. METHOD oF FORMING PIRE BOXES.

APPLICATION FILED 00T. 20, 1909.

1 ,054,420. Patented Feb. 25, 1913.

14 SHEETS-SHEET 11.

H. W. JACOBS.

METHOD oF FORMING me Boxes.

APPLICATION FILED 00T. 20, 1909. 1,054,420., Patented Feb. 25, 1913.

14 SHEETS-SHEET l2.

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H. W. JACOBS.

METHOD OP FORMING FIRE BOXES. AIPLLGATION rlLED 001220, 1909.

@54l,42(), Patented Feb. 25, 1913.

lei SHEETS*8HBET13.

H. W. JACOBS.

METHOD or FORMING FIRE BOXES.

APPLICATION FILED 00T. 20, 1909.

Patented Feb. 25, 1913.

14 BHBETHHEET 14.

e? u e w e UNITED STATES PATENT OFFICE.

HENRY W. JACOBS, 0F TOPEKA, KANSAS, ASSIGNOB, BY MESNE ASSIGNMENTS, TO

JACOBS-SHUPERT UNITED STATES 'FIRE BOX COMPANY, 0F COATESVILLE, PENN- SYILVANIA, A CORPORATIONYOF PENNSYLVANIA.'

METHOD FOBMING FEE-BOXES.

Specification of Letters Patent.

Patented Feb. 25, 1913.

To all whom z't may concern.'

Be it known that I, HENRY W. J AcoBs, of Topeka, in the county of Shawnee, andin the State of Kansas, have invented a certain new and useful Improvement in Methods of Forming Fire-Boxes, and do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to amethod of producing lire-boxes, and es ecially fire-boxes made with a plurality o sections, and its objectis to vprovide a method by which such fire-boxes can be' constructed with ease, rapidity, and at a minimum of cost, and also by which they can be constructed with such accuracy and uniformity in the like parts of different fireboxes, that such parts shall be interchangeable, and may be assembled withoutl special fitting together. And to such ends my invention consists in the method of forming fire-boxes hereinafter specified.

In the accompanying drawings Figure 1 is a vertical section of a re-box made by my z process; Fig. 2 is a side elevation of the same partially assembled; Fig. 3 is a transl verse sectional view of the \same taken on a spectively,.a plan view and an edge view of the blank from which one of my fire-box sections is made; Figs. 5 and 5 are, respectively, front and end elevations of a fire-box section formed butnot drilled; Fig. 6 is a side elevation of a fire-box section drilled; Fi s.. 7 and 8 are, respectively, a side and end elevation of a fire-box section havin a templet for drilling"'attached thereto; ig. 9 is a section on' the line 9--9 of Fig.f7; Figs. 10 and 11 are, respectively, a plan and edge view of a blank for forming an outside shell section; Figs. 12 and 13 are similar views of a completed shell section; Figs. 14

and 15 are, respectively, a side elevationV of a' stay-sheet blank and a completed stagsheet; Figs. 16 to 19 are views showing t e various stages' of making a back-head; Figs. 20 |to 23 are views showing the steps of 'making a throat plate from the blank to the completed throat plate; Figs. 24 to 27 are viewsi showing the steps of making a door-sheet from the blank to the completed door-sheet; Figs. 28 and 29 are viewsshowing a partially Aand wholly completed fluesheet; Fig. 30 vis a plan sectional view, through a water-leg of the boiler showing ythe relations of vthe Vfire-sheet. section, the

wrapper-sheet and the stay-sheet.; Fi 31 is an elevation showing a portion o the outer side of the fire, or inner, sheet of the boiler, including the sections andl stay-sheets, and 'showing the particular arrangement for making water-tight joints between such parts and the mud-ring; Fig. 31 is a perspective view of the parts shown in Fig. 31; Fig. 32 is a section of Fi 31 taken on the line 32, the section also s owing the wrapper-sheet parts and the mud-ring; Fig. 32 is a view of the lower portion of one of the sections of the fire-sheet, as seen from the` fire side thereof; Fi 33, 34 and 35 are views, res ectivel ,li e Fi s. 30, 31 and 32, but inten ed to s ow the Joint betweenV the forward crown sheet section 1 and the lluesheet 7; Figs. 36 and 37 are side elevations from different sides, showin the steps of assembling the fire-sheet sect-lons and staysheets; Fig. 38 shows the said parts turned into vertical'position and placed .upon` the mud-ring preparatoryv to securement to the mud-ring; Fig. 39 shows the assembling with the said parts of `the inner doorlate and flue-sheet; Fig. 40'is an elevation s owing the procedpre of placing the outside shell sections in place; `and Fig. 41 is an ele-V vation representmg the securement of the outer door-plate 'and the throat-sheet to the aforesaid arts.

I have c osen as an illustration of my invention that embodiment which is the best embodiment known to me. Such embodiment, however, is to Vbe regarded as typical only of other possible embodiments, and my invention is not to be limited to the specific embodiment shown. l

I have chosento illustrate my method'by applying it to a fire-box which is shown in Figs. 1 to 3, inclusive, and which is of the type of the patent to F. W. Shupert and Henry W. Jacobs #917 ,172, April 6, 1909. This fire-box consists essentially of crownsheet sections 1 lwhich are arched across which are U-shaped in cross-section so that they present outwardly projectin flanges;

of wrapper-sheet sections 3, whic also extend from side to side ofthe mud-ring, and

are formed of lsheet metal with outwardly projecting flanges, stay-sheets 4 being interposed between each two crown-sheet Sections from side to side of the mud-ring 2, and

-15 nsid'e of the mud-ring.

and extending outwardly between the corresponding wrapper-sheet sections, each staysheet and the adjacent crown-sheet flanges being riveted together, and each stay-sheet.

and corresponding Wrapper section flanges being riveted together. A door-plate 5 is riveted to the rear' crown-sheet lsection flange and to the rear wrapper-sheet section flange, and a back-head 6 is riveted to the outer edge of the door-sheet and to vthe door flange. A flue-sheet 7 is riveted to the forward crown-sheet flange. and to the flange of the forward wrapper-sheet section, the flue-sheet also being secured to the A Ithroat-sheet 8 ias'a flange that is riveted to the flue-sheet and the throat-sheet is also riveted to the outside of the mudfring. As the inner face of the mud-ring is flat, and as the crownsheet sections are not only U-shaped in cross-section, but have their outwardly projecting flanges projecting toward the mudring and must make a tight joint, not. only with each other but with the stay-sheets and with the mud-ring, a connection difficult to make tight is presented. I accomplish this formingpears 9 and 10, respectively, (see Figs. 3l and 32) on the lower ends of the crown-sheet sections which are flat and 4adapted to lie along the. mud-ring. I also cause one flange 11 of each crown-sheet section to lie alongthe stay-sheet and cut /it off approximately level with the loWerpI'O- jecting edge'12 of the stay-sheet (see Fig.

.32), the latter being cut away to afford water circulation along the to ofthe mudring. I then form the ear o the adjacent crown-sheet section so that it passes under the lower edges both of the stay-sheet and X40 o f the crown-sheet flange referred to, and

form it up on the opposite side of the staysheet, so as to fo-rm a lip ,13 which infolds the said flange and stay-sheet, and which can be Welded or riveted or calked vso as to 4,5y make a tight joint. f

The partsare to be prepared in the following manner: A crown-sheet section is formed (Figs. 4to 9) by bending a blank 14 v transversely/ and longitudinally by dies. A templet 15vis then clamped to the said section anda series of holes is drilled in the flanges, as shown'in Figs. 7 to 9. In a similar manner, from the blank 16 one of the outer 'U-shaped sections 3 is formed, and its series of rivet holes 17 is likewise drilled by the use Aof a templet (as shown in Figs. 1o to 13). I

From a blank 18 (Fig. 14) a stay-sheet 4 l5) is formed, the slots 19 being preferably' formed. by punching by dies, and the holes 20 being formed by drilling by meansk 'of a templet.

The back-head is formed (as shown in Figs. 16 to 19) by clamping the bodyA of the blank 21l against a` male d1e and then dishing operations and any chan ing of men to .23 is formed. .The rivet holes 24 in the body of the plate, and the rivet holes 30 in 70 the flange are then drilled, preferably by the use of a templet.

In forming the throat-sheet (Figs. 20 to 23) a blank 25 is treated in the same manner as-the blank of the door-sheet, to form the flange 26, and the plate is then held by means of such flange and the body while the throat 27 is being formed. The plate is then preferably drilled by the use of temi pletfs.

The door-sheet 5 is formed (Figs. 24 to 27) by punching and drilling the holes therein and flanging the door opening in the same manner as the back-head in Figs.

16 t-o 19. The flue-plate is formed (Figs. 85 28 and 29) by punching the water circulation slots by dies and forming the flue and rivetholes, the latter, at least, being preferably drilled, using a jig or templet.

The drilling of boiler parts by the use of templets greatly facilitates the making of a fire-box. The making of a fire-box of so many parts `as the present fire-box, would be very diflicult and expensive, if it were not for shaping the partsl accurately by the g use ofdies and placing the holes accurately7 -by the use of templets, since otherwise Vthe errors in shaping and putting together each to the adjacent parts would be multiplied as thel number of parts connected together is increased.

The parts of the` fire-box are now ready for assemling, except the reverse lapping ofthe ear 28 of the forward crown-sheet section l, to form the joint between such, section and the flue-sheet (as shown in Figs. 33'to 35).` It will be seenthat the ear 28 is turned back, away from its crown-sheet section la, so that it lies against the inner face of the flue-'sheet 7, thus a tight joint can be made.

In assembling the parts to form a complete fire-box (as shownl in Figs. 36 to 41) the crown-sheet sections are stacked one upon another in a horizontal position, with a stay-sheet interposed (as shownin Figs. 36 and 37) and riveted together. All the crown-sheet sections and stay-sheets are preferablyI riveted at this ting; This avoids any handling of the box be ween the rivet- 120 perform alternate operations, and it enables l the riveting or calking of these parts to be done with the greatest possibleeasa The ears `at the bottom of the crown-sheet lsections are riveted together and, if desired,

3 are then slipped into place between the stay-sheets by a vertical movement (as shown in Fig. 40) and are riveted to each other and to the staysheets. By this method the riveting of these parts together can proceed without interruption from beginning to end, thus saving the time of changing men and tools which would occur if other operations were interposed. The back-head (S and the throat-sheet S are then secured in place and the rivets securing the parts to the mud-ring put in when the firebox is ready for calking. The mud-ring may, if desired, be the last part put in place.

Not only can sectional fire-boxes be made by this method with great ease and rapidity, and at a minimum cost, but the component parts of the fire-box may be constructed With great accuracy and uniformity. By forming all of the `component parts by formers and dies, and drilling the rivet holes by the aid of jigs, all of lthe units of the fire-box produced will be alike in their essential features and a uniformity and exactness will result, Which is independent of the skill of the workmen.

Claimsl. The method of forming fire-boxes comprising forming U-sllaped inner and outer.

channel sections having outwardly extended flanges, forming stay sheets adapted to lie between and connect corresponding pairs of flanges of said inner and outer sections, and assembling such fire-boxes by first securing said inner sections and stay sheets together alternately, and afterward placing said outer sections between said stay sheets and securing their flanges and said stay sheets together.

Qiavlhe method of forming fire-boxes comprising alternately placing U-shaped inner channel sections, having outwardly projecting flanges, and correspondingly shaped stay sheets in coaxial relation, and securing said flanges and stay sheets together, and afterward placing U-shaped outer -channel sections between said stay sheets, and securingtheir flanges and stay sheets together.

3. The method of forming fire-boxes comprising alternately placing U-shaped inner channel sections, having outwardly projecting flanges, and correspondingly shaped stay sheets in coaxial relation and securing said stay sheets together and afterward last. of said series of' inner and outer sections respectively, and finally securing a throat plate and a back head to said flue-sheet and door sheet respectively.

4. The method of forming fire-boxes coinv prising alternately placing U-shaped inner channel sections, having outwardly projecting. flanges, and correspondingly shaped stay sheets in coaxial relation, bringing said parts into proper relation to amud-ring, laying the lower ends of said flanges along the inner face of said mud-ring, and placing U-shaped outer channel sections between said stay sheets, said outer sections being put in place after said inner sections and stay sheets are assembled.

5. The method ot' forming fire-boxes comprising alternately placing U-shaped inner channel sections, having outwardly projecting flanges, and correspondingly shaped stay sheets in coaxial relation, bringing said parts into proper relation to a mud-ring, laying the lower ends of said flanges along the inner face of said mud-ring, causing said flanges to infold the lower ed'ges of said stay sheets, and placing U-shaped outer channel sections between said stay sheets,

said outer sections being put in place.

after said inner sections and stay sheets are assembled.

(l. The method of forming fire-boxes comprising alternately placing U-shapedjinner channel sections, having outwardly projecting flanges, and correspondingly shaped stay sheets in coaxial relation, bringing said parts into proper relation to a mud-rmg, laying the lower ends of said flanges along the inner face of said mud-ring and overlapping eaeh other,.causing said flanges to infold the lower edges of said stay sheets, and placing the U-shaped outer channel sections between said stay sheets, said outer sections heilig put in place after said inner sections and stay sheets are assembled.

`In testimony that I claim the oregoin I have hereunto set my hand.

HENRY W. JACOBS.

Witnesses:

M. MEIKLE, A. NEwooMB. 

